* {
    border-radius: 10px;
}
body {
    background-color: lightgray;
}

#principal {
    background-color: gray;
    height: 800px;
    width: 900px;
    margin: 0px auto;
}

#topo {
    background-color: lightcyan;
    height: 100px;
    width:  890px;
    margin: 5px 5px 5px 5px;
    float: left;
}

#direito {
    background-color: lightgreen;
    height: 685px;
    width:  215px;
    float: right;
    margin: 0px 5px 5px 0px;
}

#base {
    background-color: lightyellow;
    height: 230px;
    width:  670px;
    float: left;
    margin: 0px 5px 5px 5px;
}

#esquerdo {
    background-color: lightblue;
    height: 450px;
    width:  215px;
    float: left;
    margin: 0px 5px 5px 5px;
}

#meio {
    background-color: white;
    height: 450px;
    width:  450px;
    float: left;
    margin: 0px 5px 5px 0px;
}

#login_cadatrar{
    margin: 0 10px 20px 800px;
}